Description： 1. Two plates in this kit are made of 6061 aircraft grade billet aluminum anodized and CNC laser cut or CNC machined out of high quality materials. 2. Another 2 block plates and 2 plug fittings are made of 304 stainless steel, which will not rust. 3. Including one piece high temperature resistant graphite gasket with good sealing performance. 4. All materials are durable to be better suitable for the engine environment. 5. For off-road use only! Specifics: 100% Brand New. Type: Block Off Plate Material:304 Stainless Steel & Billet Aluminum Fitment: Fits for Volvo, Peterbilt, Mack, International, Freightliner, Kenworth 2007-2010 with the Cummins ISX Engine. Package Content: 4 * Block Plates 1 * Gasket 4 * O-rings 2 * Plug Fittings  Fitment: Fits for Volvo, Peterbilt, Mack, International, Freightliner, Kenworth 2007-2010 with the Cummins ISX Engine. Package Content: 4 * Block Plates 1 * Gasket 4 * O-rings 2 * Plug FittingsDescription: 1. Two plates in this kit are made of 6061 aircraft grade billet aluminum anodized and CNC laser cut or CNC machined out of high quality materials. 2. Another 2 block plates and 2 plug fittings are made of 304 stainless steel, which will not rust. 3. Including one piece high temperature resistant graphite gasket with good sealing performance. 4. All materials are durable to be better suitable for the engine environment. 5. For off-road use only! Specifics: 100% Brand New. Type: Block Off Plate Material:304 Stainless Steel & Billet Aluminum Fitment: Fits for Volvo, Peterbilt, Mack, International, Freightliner, Kenworth 2007-2010 with the Cummins ISX Engine. Package Content: 4 * Block Plates 1 * Gasket 4 * O-rings 2 * Plug Fittings